How Long After Your LMP Can You Get Pregnant (And Why)?

Exact Answer: Fifteen Days

The pregnancy duration for each woman is different. It depends on a variety of factors. The gestation period is determined by taking the date of the first day of a woman’s last menstrual cycle to the date when the child is born, and so the average pregnancy period of a human is said to be forty weeks.

LMP is defined as the last menstrual period. It is the time when your menstrual period has lasted when you become pregnant. The doctor uses it to tell at which date you are going to expect your child. Basically, it is told that it can be after forty weeks or sometimes a little time before forty weeks from a woman’s last menstrual period.

How Long After Your LMP Can You Get Pregnant

How Long After Your LMP Can You Get Pregnant?

It has been scientifically identified that the gestation period is about nine months or close to two hundred and sixty days. There are a lot more things that people should learn about pregnancy. The gestation period is the time from when the baby was formed in the womb to childbirth. Most men think that they don’t have to learn anything about pregnancy. But a man should be part of pregnancy as much as a woman. He should take good care of his wife so that the baby shall be born healthy. Like the mother carrying the baby in the womb, the father should carry the baby in his heart.

The last menstrual period or the LMP is the first day when periods have ended or the day at which your menstruation lasts before falling pregnant. Remember that the ovulation or egg formation occurs before your periods start as it makes the egg so much time is needed; hence after a specific time, your periods start. Ovulation mainly occurs for one time in a whole month. It occurs for up to 10 days. The timings of ovulation can vary depending upon the menstrual cycle and how regular it is. Many people get ovulated from eleven to twenty-one days, any day among these.

Probability Of PregnancyTime After LMP
Normal ProbabilitySeven days
Maximum ProbabilityFifteen Days

In normal cases, a pregnancy can occur as early as the seventh day after the LMP. In contrast, the maximum probability of getting pregnant is close to fifteen days.

Why Does It Take That Long After LMP To Get Pregnant?

It takes that long after LMP to get pregnant because some time is required to mate sperm and the egg. Excessive exercises also affect when a woman starts understanding that her body is facing any changes considering the less weight of a person. So more chances of delay in pregnancy can occur. Timings of ovulation can change like timings of pregnancy observed by a woman. There can be an odd cycle where the women haven’t ovulated and might feel the symptoms lead to an early period rather than pregnancy.

To calculate the time for ovulation, you have to start from the first day of LMP. Or you can also calculate it by taking approximately twelve to fifteen days from the succeeding expected period. Many people have the same period for ovulation, but few women might start forming eggs within a week or even after their last period. So, some have a concise cycle of ovulation. This is a natural thing for them.


Pregnancy after the last menstrual cycle is affected mainly by how much stress you are taking, suffering from any diseases or sickness, taking medicines or medication, changing lifestyles, etc. If such things are, they may increase or decrease after the last cycle when you become pregnant. Sometimes, obesity can lead to the symptoms of pregnancy getting delayed.


Overall, it can be concluded that LMP is a term used to refer to the last menstrual period before she becomes pregnant. One egg is released from the ovary during ovulation. If the eggs are unable to become fertilized, then they are absorbed by the uterine lining. So, the women get the period. And if this doesn’t happen, it means she is pregnant.

On average, pregnancy can occur as soon as seven days after the last cycle, but generally, this happens mostly somewhere close to fifteen days. Women should eat good food, take plenty of fluids, not consume alcohol, and never smoke or be near someone who smokes during pregnancy.


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